Table 1.
Profile of physical and chemical characteristics of sediments collected in Mucuripe Bay, Fortaleza during the intense dredging (Survey 1) and after the end of activities (Survey 2). Reference site located at Icapuí. Exceedances marked in bold.
| Variable | Reference | Survey 1 |
Survey 2 |
SGQs |
SQVs |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| MD1 | MD2 | MD3 | MD1 | MD2 | MD3 | Level 1 | Level 2 | Level 1 | Level 2 | ||
| Bathymetry (m) | 0 | 11 | 6 | 5 | 13 | 6 | 8 | - | - | - | - |
| Sand (%) | 95.9 | 37.9 | 82.7 | 91.6 | 36.6 | 57.6 | 87.9 | - | - | - | - |
| Fine particles (%) | 4.6 | 62.2 | 19.1 | 10.0 | 63.5 | 44.4 | 13.4 | - | - | - | - |
| TOC (%) | 0.10 | 0.49 | 0.07 | 0.06 | 0.69 | 0.04 | 0.06 | 10 | - | - | - |
| Al (%) | 0.09 | 0.96 | 0.24 | 0.25 | 0.96 | 0.06 | 0.08 | - | - | - | - |
| Fe (%) | 0.13 | 1.06 | 0.25 | 0.26 | 1.08 | 0.14 | 0.21 | - | - | - | - |
| Cd (μg g−1) | 0.19 | 0.16 | 0.16 | 0.15 | 0.15 | 0.14 | 0.14 | 1.2 | 7.2 | - | 0.75 |
| Cr (μg g−1) | <2.0 | 25.9 | 15.5 | 13.4 | 2.5 | <2.0 | <2.0 | 81 | 370 | - | 65.8 |
| Cu (μg g−1) | 0.4 | 13.6 | 1.4 | 1.6 | 11.1 | 2.0 | 2.2 | 34 | 270 | - | 69 |
| Ni (μg g−1) | 2.1 | ∗8.0 | 1.6 | 2.2 | ∗10.1 | ∗4.2 | 3.5 | 20.9 | 51.6 | 3.89 | 21.2 |
| Pb (μg g−1) | 9.8 | ∗22.0 | ∗15.9 | ∗19.4 | ∗22.9 | ∗13.9 | ∗22.4 | 46.7 | 218 | 10.3 | 22 |
| Zn (μg g−1) | 0.7 | 25.8 | 2.5 | 2.8 | 21.0 | 1.1 | 2.1 | 150 | 410 | 37.9 | 110.4 |
| ΣAHs (μg g−1) | 0.6 | 655 | 1.0 | 0.8 | 408 | 0.5 | 0.5 | - | - | - | - |
| ΣPAHs (ng g−1) | <1.0 | ∗1160 | 3.0 | <1.0 | ∗691 | <1.0 | <1.0 | 4000 | - | 163 | 950 |
| ΣLABs (ng g−1) | <0.8 | <0.8 | <0.8 | <0.8 | 91.6 | <0.8 | <0.8 | - | - | - | - |
Bathymetry (m): underwater depth; TOC: total organic carbon; AHs: aliphatic hydrocarbons, PAHs: polycyclic aromatic hydrocarbons; and LABs: linear alkylbenzenes. ∗ = SQVs exceedances.